Does anyone know how to remove the "G" on my color Axis numeric labels? I've tried numerous things, including attempting to override/disable the "numericSymbols" in the highmaps.js src file and no luck. Also tried logarithmic, but the symbols get weird also. Seems like it should be an easy fix. Thanks for any help.
legend: {
title: {
text: '$ value in billions'}
,
numericSymbols: {enabled: false},
layout: 'horizontal',
//labels: {enabled: false},
align: 'center',
verticalAlign: 'bottom',
float: 'center'
// valueSuffix: 'B',
//margin: 50
}
,
mapNavigation: {
enabled: true,
buttonOptions: {
verticalAlign: 'bottom',
align: 'left'
}
}
,
colorAxis: {
min: 0,
minColor: '#ffffff',
maxColor: '#0c234b',
labels: {enabled: false}
},
http://jsfiddle.net/drupalStarlord/ne3a2d99/1/
The G is short for giga, denoting a factor of a billion.
You can either create a custom formatter for the colorAxis labels, for example (JSFiddle):
colorAxis: {
labels: {
formatter: function() {
return this.value/1000000000 + "B";
}
}
}
This will not adapt if the values should suddenly be in a much smaller or larger range, unless you add some more depth to the code.
Or you could change the default numericSymbols metric prefixes, for example (JSFiddle):
Highcharts.setOptions({
lang: {
numericSymbols: ['.', '..', 'B', '....', '.....', '......']
// Default is: ['k', 'M', 'G', 'T', 'P', 'E']
}
});
Here you'd have to find a suitable letter for each one if you expect the value range to vary.
Related
When I have a chart over several months, the interval is set to include the first of the month making intervals uneven and causing labels to overlap. Is this the expected behavior? Is there a way to disable this?
example
Here is an example based off one of echarts examples.
option = {
xAxis: {
type: 'time',
},
yAxis: {
type: 'value',
},
series: [
{
type: 'line',
symbol: 'none',
lineStyle: {
color: '#5470C6',
width: 5
},
data: [
['2019-08-17', 200],
['2019-10-10', 200],
['2019-10-11', 560],
['2019-10-12', 750],
['2019-10-13', 580],
['2019-10-14', 250],
['2019-10-15', 300],
['2019-10-16', 450],
['2019-10-17', 300],
['2019-11-15', 100]
]
}
]
};
If you want even intervals, you can instruct echarts to treat the dates as discrete values by changing the configuration of the axis:
xAxis: {
type: 'category',
}
echarts: bar chart bars are located left and right of the value on the category axis:
How to tell echarts to start the bar with the value on the category axis? Like this:
To clarify the problem, here ist another example. This is a chart of the hourly sum of precipitation. Every bar should show the sum from the bottom to the top of the hour, the data values are conencted to every bottom of the hour.
as you can see, the bars are not starting at 8:00, they are starting at 7:30.
Data: (timestamps are shown in CET)
series: [
{
name: "Niederschlag",
type: "bar",
data: [[1608534000000, 3], [1608537600000, 5], [1608541200000, 2], [1608544800000, 0], [1608548400000, 1] ],
barWidth: '100%'
}
]
It should look like this:
Start point of bar here doesn't matter, you need align labels to left: https://echarts.apache.org/en/option.html#series-bar.label.align
you need a hidden xAxis like below:
option = {
xAxis: [{
type: 'category',
data: [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23],
show: false
}, {
type: 'category',
data: [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24],
boundaryGap: false,
axisTick: { alignWithLabel: true },
position: 'bottom'
}],
yAxis: {
type: 'value'
},
series: [{
data: [120, 200, 150, 80, 70, 110, 130,120,210,110,210],
type: 'bar',
barCategoryGap:'20%',
itemStyle: {
},
xAxisIndex: 0,
backgroundStyle: {
color: 'rgba(220, 220, 220, 0.8)'
}
}]
};
You have not provided the complete chart config, so I recommend using this one. Also pay attention on method useUTC and you need to know that "By default, echarts uses local timezone to formate time labels"
So I see this state of Chart by you data with offset -180:
var myChart = echarts.init(document.getElementById('chart'));
var chartData = [
[1608534000000, 3],
[1608537600000, 5],
[1608541200000, 2],
[1608544800000, 0],
[1608548400000, 1],
];
var option = {
tooltip: {},
xAxis: {
type: 'time',
data: ['00:00', '01:00', '02:00', '03:00', '04:00', '05:00', '06:00', '07:00', '08:00', '09:00', '10:00', '11:00', '12:00', '13:00', '14:00', '15:00', '16:00', '17:00', '18:00', '19:00', '20:00', '21:00', '22:00', '23:00'],
splitNumber: 24,
},
yAxis: {
type: 'value'
},
series: [{
name: "Niederschlag",
type: "bar",
data: chartData,
barWidth: '100%',
}],
useUTC: false,
};
myChart.setOption(option);
<script src="https://cdn.jsdelivr.net/npm/echarts#4.9.0/dist/echarts.min.js"></script>
<div id="chart" style="width: 1024px;height:400px;"></div>
In the example below the y-axis crosses at 1, rather than 0. Is there a way to achieve this in echarts?
It seems to me, literally, you can't do this with basic bar chart because it will break the coordinate system and result will be anything but not a bar chart.
If you need only visual like on attached picture then you can hide xAxis and draw its surrogate with markLine but you will have the troubles with bar positioning (that will fix with stack and transparent bars, see below).
If you need real chart with responsive, zoomable and other opts then in the Echarts you can use custom series for build own chart type (see example).
Example how to make picture like attached:
var myChart = echarts.init(document.getElementById('main'));
var option = {
tooltip: {},
xAxis: {
data: ['Category-1', 'Category-2', 'Category-3', 'Category-4'],
show: true,
axisLine: {
show: true,
lineStyle: {
opacity: 0
}
},
axisTick: {
show: false,
}
},
yAxis: {
max: 4,
min: -1
},
series: [{
name: 'Series-1',
type: 'bar',
stack: 'group',
data: [1, 1, -3],
color: 'rgba(0,0,0, 0)',
}, {
name: 'Series-2',
type: 'bar',
stack: 'group',
data: [{
value: 1,
itemStyle: {
color: 'red'
}
}, {
value: 2,
itemStyle: {
color: 'green'
}
}, {
value: 1,
itemStyle: {
color: 'orange'
}
}],
markLine: {
symbol: "none",
data: [{
silent: false,
yAxis: 1,
lineStyle: {
color: "#000",
width: 1,
type: "solid"
}
}, ],
label: {
show: false,
}
},
}]
};
myChart.setOption(option);
<script src="https://cdn.jsdelivr.net/npm/echarts#4.8.0/dist/echarts.min.js"></script>
<div id="main" style="width: 600px;height:400px;"></div>
P.S. If this not a secret, why you need it?
I'm trying to make a a combination of a candlestick chart (representing stock data) and a bar chart (representing volume).
I already have them displayed on one chart but the display and layout I'm having trouble with.
For one, the candlestick and bar data are placed side-by-side rather than stacked on top of each other. Another error is the scale of the volume data for the bar chart is not represented properly in the y-axis (which uses data from candlesticks as basis).
Here is my current code to render the chart:
chart = new Chart(ctx, {
type: 'candlestick',
data: {
labels: labelsData,
datasets: [{
label: "My Data",
data: chartData
},
{
label: 'Volume',
data: volData,
type: 'bar'
}]
}
});
labelsData contains the Date values for each item entry
chartData contains JSON object with c,h,l,o,t (close,high,low,open,date) to
represent stock data for each item entry
volData is an array containing numbers to represent volume for each item entry
What should I add to make the candlesticks and bars placed on the same column, as well as have the bars have their own scale so they do not overshoot the height of the chart?
It seems you need to scale the volume data since it's two different value units in Y,
It seems like currentlty there isn't support for this in chartJs I created a feature request, follow the link to see the two issues that were closed due to this.
https://github.com/apexcharts/apexcharts.js/issues/2068
With default configuration you're not easily able to add barcharts.
Here is steps you need to do;
Base config:
const config = {
// type: 'candlestick', // you must remove this, this option is braking the chart
data: {
datasets: []
},
options: {
parsing: false, // must be here, solves another stupid problem
spanGaps: true, // for better performance
animation: false, // for better performance
pointRadius: 0, // for better performance
plugins: {
title: {
display: false,
text: 'Fiyat Grafiği'
},
},
responsive: true,
maintainAspectRatio: false,
scales: {
x: {
type: 'timeseries',
},
y: {
type: 'linear',
},
volume: {
type: 'linear',
beginAtZero: true,
position: 'right',
max: maxVolume * 10, // maxVolume should be the maximum number of volumes
grid: {
display: false, // for better presentation
},
ticks: {
display: false, // for better presentation
},
}
},
interaction: {
intersect: false,
mode: 'index',
},
}
};
Second step is preparing the datasets;
let dataSets = [
{
type: 'candlestick', // this must stay
label: 'Financial Graph',
data: data['klines'].map(function (kline) {
return {
'x': moment(kline['from']),
'o': kline['open_price'],
'c': kline['close_price'],
'h': kline['high_price'],
'l': kline['low_price']
};
}),
color: {
up: 'rgb(26, 152, 129)', // those colors are better than defaults
down: 'rgb(239, 57, 74)', // those colors are better than defaults
unchanged: '#999', // those colors are better than defaults
},
borderColor: {
up: 'rgb(26, 152, 129)',
down: 'rgb(239, 57, 74)',
unchanged: '#999',
},
order: 10,
yAxisID: 'y', // this must stay
},
{
type: 'bar',
label: 'Volume',
data: data['klines'].map(function (kline) {
return {
'x': moment(kline['from']), // i used moment, feel free to use your own time library
'y': kline.quote_asset_volume,
}
}),
backgroundColor: data['klines'].map(function (kline) {
return kline.open_price < kline.close_price ? 'rgb(26, 152, 129)' : 'rgb(239, 57, 74)' // for better presentation
}),
borderColor: '#fff',
borderWidth: 1,
order: 12,
yAxisID: 'volume', // this must stay
barPercentage: 0.5, // this must stay
barThickness: 6, // this must stay
maxBarThickness: 8, // this must stay
},
]
Result;
I have a combined BarLineChart. Is there a possibility to add a label near the line (in this case how much the sales increased from 2015 to 2016) ?
I hope there is some way
This is what i have so far
I want this
Thanks
The easiest way to do this is to use the chartjs-plugin-annotation plugin provided by the same team that provides chart.js.
You can use the plugin to draw arbitrary lines or boxes on your chart that can also contain a label. Unfortunately, the plugin does not yet support point annotations, so you have to use a little hack to enable the label to display but not the line or box.
Here is an example chart that uses the plugin to draw a horizontal white line at a specific Y value (white is used so that it blends in with the chart background and becomes invisible). The line is configured to also have a label. The end result is a text annotation on the chart with no visible line.
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ['Jan 21st', 'Feb 21st'],
datasets: [{
type: 'line',
label: 'B',
data: [10, 25],
fill: false,
borderWidth: 3,
borderColor: chartColors.orange,
lineTension: 0,
}, {
type: 'bar',
label: 'A',
backgroundColor: chartColors.blue,
data: [10, 25],
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}],
xAxes: [{
ticks: {
min: 'Jan 21st',
max: 'Apr 21st',
}
}],
},
annotation: {
annotations: [{
type: 'line',
mode: 'horizontal',
scaleID: 'y-axis-0',
value: 18,
borderColor: 'white',
borderWidth: 0,
label: {
xAdjust: -50,
fontSize: 16,
fontColor: 'black',
backgroundColor: 'white',
content: "+20%",
enabled: true
}
}],
drawTime: 'beforeDatasetsDraw'
}
}
});
You can see it in action at this codepen.
One final note, if you include the plugin in your app and you also use charts that don't use scales (e.g. pie/doughnut) then you will get an error. This is a known issue and has been logged here.
The workaround is to add this to your pie/doughnut chart config (or it might be easier to add it to the pie/doughnut global default config).
scales:{
yAxes: [],
xAxes: []
},